Alexander drummond



(No Model.) w

A. DRUMMOND. GLAZED STRUCTURE INVENTEIR:

Patented Dec. 30, 18-90.

UNITED 1 STATES rA'T 'NT came.

ALEXANDER DRUMMOND, OF GLASGOW, SCOTLAND.

GLAZED STRUCTURE.

SPECIFICATION forming part of Letters Patent No. 443,506, dated December 30, 1890. Application filed November 26, 1889. Serial 1%. 331,714. a. model.) Patented in England April 21, 1888, No. 5,947.

To all whom it may concern.-

Be it known that I, ALEXANDER DRUM- MOND, a citizen of Great Britain, residing at Glasgow, in the county of Lanark, Scotland,

have invented certain new and useful Im provements in Glazed Structures, (patented in England April 21, 1888, No. 5,947,) f which the following is a specification.

In glazingstructures, such as greenhouses, railway-stations, termini, &c., according to the system at present in vogue, astragals or glazing-bars are used to support and hold the glass sheets in position; but, in glazing structures in accordance with my invention the use of astragals is dispensed with, the glass sheets being supported on the purlins alone. If, however, it is desired to use astragals in conjunction with the purlins, they may be employed.

The invention is fully illustrated in the accompanying drawings, whereon- Figure 1 is aview of a portion of a roof glazed in accordance with my invention. Fig. 2 is a detail View to a larger scale, showing the junction of the glass sheets. Figs. 3 and 4 are views showing dilferent methods of securing the glass sheets in position from that illustrated at Fig.1. Figs. 5, 6, and? are views of clips or devices for holding the glass sheets in position on the purlins. Fig. Sis a sectional view of a purlin with grooves. Figs. 9,10, and 11 are sectional views showing the clips in position and gripping the glass sheets and caps. Fig. 12 is a view of the one-armed clip. Said one-armed clip is for use with fiat sheets when glazed, as shown in Fig. 4. A clip is fitted at each side of the alternate sheets or caps and the single arms catch their edges, thus preventing lateral movement.

Similar letters refer to similar parts throughout the several views.

Referring to the drawings, in carrying out my invention I secure the glass sheets a (which are preferably corrugated or prismatic rolled glass, although the sheets may have any other configuration upon their surface or be flat) in a groove or recess 1) cut or made in the purlins c. A cap d, preferably of glass, as shown, is laid over the meeting edges of the sheets, and is securely held in place by means of clips e, one end of the clip being fixed to the purlin and the other part being jointed in over the top of the glass. The clips 6 are made of a base-piecef, having screw or nail holes g at one end, so that it can be secured to the purlin, as shown at Fig. 3, and made with a flanged or raised part hat the other end. In this part h, under one arrangement, a dovetail groovej is cut or made, as shown at Figs. 5 and 6. This groove is preferably slightly tapered toward one end. vVhen fixing the glass sheets in position, a piece or head 11, having a projection formed on it corresponding to the groove j and covering and gripping the cap d, is dovetailed, wedged, or slipped into position into said base-piece f. By this meansthe whole issecurely and firmlyheld in position. The head or piece?) may have two arms Z, one on each side, projecting downwardly, which grip either side of the cap (Z and prevent lateral movement.

The clip shown at Fig. 7 is stamped out or made from a piece of sheet metal, the raised part h being formed by the turning over of the parts h h. The head or piece 11, which has arms Z for gripping the sides of the lower end of the upper glass cap, is slipped into position in the raised part h, the groove or slot formed by the turned-over parts 71, 71/ being for its reception. Arms m are in this clip made on the base-piece f for holding the upper end of the lower cap firmly in position, and thus preventinglateral movement. One arm m is shown in dotted lines. Vith this arrangement of clip grooves are not required in the purlins for the reception of the glass sheets.

Instead of having a narrow cap d for covering the abutting edges of the glass sheets a, the glass sheets may be alternately laid one over the other, as shown at Fig. 1. The purlins in this case require to have grooves cut in them for the reception of the glass sheets. In this View, as will be seen, the intermediate sheet d of the three shown serves as a cap and overlaps the other two, being secured in position by the clips. The clips may in this case have a single arm Z at one side of the head or piece t', as shown in end elevation in the detail view, Fig. 1, so as to grip the side of the sheet and prevent lateral movement.

\Vhen long sheets of glass are used for glazing, it is desirable to have auxiliary supportpurlins a laid between the ordinary purlins to prevent the sheets from warping or bending.

I prefer to use the prismatic rolled glass shown in the figures, as it can be easily fitted in position, the projection of one sheet fitting into the groove in the other, while a secure and rain-tight joint is effected. When flat sheets of glass are used, a thin strip of rubber or tarred canvas may be placed underneath the caps or between the meeting edges of the sheets to prevent leakage.

o is a lead flashing. p are slates, and q sarking.

Although I have shown diiterent descriptions of clip, these may be slightly varied without departing from my invention.

My improved method of glazing structures is much less expensive and can be more easily and rapidly fitted than any of the lead, zinc, or putty systems now in vogue.

What I claim as my invention, and desire i i l i I 1 the whole firmly in position, substantially as set forth.

2. In glazed structures, the combination, with the glass sheets, of a glass cap d, covering the meeting edges of the glass sheets, and a two-part clip for holding the cap and sheets in position, one part of said clip being fixed to the purlin and the other part jointed in over the top of the glass, substantially as described.

A clip for holding the glass sheets in position, consisting of a base-piece f, a raised part h, having a groove in it, and a piece or head i, fitting into said groove, substantially as described.

4. A clip for holding the glass sheets in position, consisting of a base-piece f, having arms m, a raised part 71., and a piece or head 1', having arms 7, fitting into said raised part, substantially as described.

In witness whereof i have hereunto set my hand in presence of two witnesses.

ALEXR. DRUMMONI).

Witnesses:

lIUen Frrzrirrnion, \VILLIAM FLEMING. 

